[Tagging] New proposal: Obligatory tagging of oneway on motorway_link

[Kieron Thwaites]

> Though I agree in principle with the idea of making tagging more
> explicit, how big of a practical concern is this? i.e. how many times in
> the real world is motorway_link a two-way road?

While I agree such a case is rare, it is possible.

See: http://www.openstreetmap.org/way/68433570 -- while this example
is a trunk_link and not a motorway_link, the trunk road in question
may be upgraded to motorway one day (and thus the trunk_link).

--K